package com.guet.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @author MicahYin
 * @date 2021/1/25 23:41
 */
@Service
public class PaymentService {
    /**
     * 正常访问，不会出错的方法
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id){
        return "线程池：  "+Thread.currentThread().getName()+"  paymentInfo_OK,id:  "
                +id+"\t"+"O(∩_∩)O哈哈哈~";
    }

    //这部分注解的意思是，设定该服务最长的等待时间为3s，超过3秒之后启动服务降级，启动paymentInfo_TimeOutHandler方法
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value = "3000")
    })
    public String paymentInfo_TimeOut(Integer id){
        int timeNumber=5;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        }catch (InterruptedException e){
            e.printStackTrace();
        }
        return "线程池：  "+Thread.currentThread().getName()+"  paymentInfo_TimeOut,id:  "
                +id+"\t"+"O(∩_∩)O哈哈哈~"+"  耗时(秒)"+timeNumber;
    }
    public String paymentInfo_TimeOutHandler(Integer id){
        return "线程池：  "+Thread.currentThread().getName()+"系统繁忙或运行报错，请稍后再试：id:"
                +id+"\t"+"哭~~~";
    }

    /**
     * 在10秒的时间窗口内，请求10次，失败率超过60%，则跳闸
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),//是否开启断路器
            //在10秒的时间窗口内，请求10次，失败率超过60%，则跳闸
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),//时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),//失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if (id<0){
            throw new RuntimeException("****id  不能为负数...");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功，流水号:"+serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能为负数，请稍后再试//哭~~  id:"+id;
    }
}